Nonlinear Models and Experimental Investigation of Lifetime History of HSC Flexural Beams

The nature of fracture in high strength concrete is brittle and therefore, the investigation behavior of flexural high strength concrete (HSC) members is important. This paper describes the deflection, strain and energy ductility and the lifetime history of experimental and theoretical analysis of six caste reinforced HSC beams with different percentage of ρ and ρρ'. The beams were loaded incrementally by a two point loads and the vertical deflection and concrete strain were measured at mid span, at 20cm from mid span and under load point up to failure. Based on the experimental results, load-deflection, load-strain and energy observed diagrams of each beam for mentioned sections plotted. In the theoretically phase, a 3-D model i.e., ANSYS nonlinear software was used and the load-deflection, load-strain and energy observed diagrams were also plotted and the comparison of experimental and theoretical results for lifetime history of HSC beams is performed. The obtained results by two methods are indicated that a reasonably good agreement is achieved.